US1031678A - Whistle. - Google Patents

Description

E. W. SGHURMAN.

WHISTLE. APPLICATION FILED JAN. 25, 1909.

Patented July 2, 1912.

, Ina/mafia", Elias WSchur man;

COLUMBIA PLANOGRAPH CO.,WASH|NGTON. D. c.

iINiTno sTATns PATENT' OFFICE.

ELIAS w. SCI-IURMAN, on BOSTON, MASSACHUSETTS; ASSIGNOR, BY DIRECT AND MESNE ASSIGNMENTS, To HE RANDALL-FAIGI-INEY COMPANY, or BOSTON, MAS- SAOI-IUSETTS, A ooRroRA-TIoN or MASSACHUSETTS.

WHISTLE.

- Specification of Ilett e rsPatent.

Patented J uly 2, 1912".

Application fileda'l'anuaryi25, 1909.. Serial No. 474,180.

To all whom it may concern:

Be it known that I, ELIAS WV. SOHURMAN, a citizen of the United States, and a resident of the city of Boston, county of Suffolk, and Commonwealth of Massachusetts, have invented certain new and useful Improvements in Whistles, of which the following is a specification.

The object of this invention is the construction of a whistle designed to be blown by the exhaust from an internal combustion engine, and which can not only be rendered either mute or sonorous at a seconds notice, but which can be varied in quality and intensity of tone emitted.

Referring to the drawings forming part of this specification, Figure 1 is a side elevation of an exhaust whistle made in accordance with my invention. Fig. 2 is a side sectional elevation of the same. Fig. 3 is a transverse section on the line XX in Fig. 2.

The reference numeral 1 designates the exhaust pipe terminal of an explosion engine, or the outlet to any quantity of steam, air or other gas under pressure. This terminal is preferably made rectangular in cross-section, as shown in Fig. 8, and is partially cut away at an acute angle, as in Figs. 1 and 2. Beneath this cut away section is pivoted or hinged a flap 2, which, when brought up into contact with the edges of such section will leave a narrow terminal slit 3 through which the exhaust will issue and by its impinging against the opposing edge A of the resonator 5, produces the shrill sonorous vibrations desired.

A spring 6 attached to the flap 2 and suitably anchored keeps the latter normally open, as in Fig. 1, and so permits the exhaust to freely escape without affecting the whistle. By suitably connecting this flap to a treadle or lever, such flap can be instantly brought up into its closed position and the whistle sounded at a moments call. Such connecting means is preferably a cord 7 passing down over the pulley 8 to a stirrup 9 whose ends engage the eyes 10 of the cross bar 11, as shown in Fig. 3. By varying the position of this flap, as by holding it a short distance away from its fully closed position, or by quickly swinging it toward and from its closed position two or more times, the whistle is made to emit either a shrill and loud sound, or a deeper and less intense, or one slurring through a considerable range of high and deep tones. To further increase the Siren-like character of the blast emitted by this whistle, I provide the fan-wheel 15 mounted to revolve freely within the sonorous chamber or resonator 5, and having its lowermost fans coming just within range of the blast from the slit 3. As this fan-wheel does not acquire its maximum of velocity for a second or two after the whistle begins to sound, the quality of the Sound produced will rapidly vary, and the intensity and pitch will quickly range upward in a most alarming manner, insuring that no pedestrian will long remain unmoved and inattentive to what is approaching him.

What I claim as my invention and for which I desire Letters Patent is as follows, to wit 1. A whistle comprising a resonant chamber having an opening through its wall, and a tube having a narrow slit at its end through which to direct a blast of gas or the like against an edge of said opening and thereby to generate a sound; a sect-ion of said tube being adapted to be opened and closed at will, and one end of said section forming one side of said slit, whereby the outward movement of Said section not only opens said tube for the escape of the gas, but widens said slit to further insure the muteness of the whistle.

2. A whistle comprising a resonant chamber having an opening through its wall, a tube having a narrow slit at its end through which to direct a blast of gas or the like against an edge of said opening for the production of sound, a section of one side of said tube being pivotally supported to swing away from the remainder of the tube, the free end of said sect-ion forming one side of said slit, and means for opening and closing Said section at will.

3. A whistle comprising a resonant chamber having an openlng through its wall, and a tube having a narrow slit at its end through which to direct a blast of gas or the like against an edge of said opening, a section of one side of said tube being pivotally supported at its end opposite to said slit,

and formed with lateral right-angled flanges invention, I have hereunto set hand this adapted to inclose the sides of said tube 19th day of January, 1909. when in operating position, the free'end of said section forming one side of said slit, t ELIAS SOHURMAN' and said section having means operative at Witnesses: Will for opening and closing it. A. B. UPHAM,

In testimony that I claim the foregoing HENRY L. WHI'I'I'LESEY.

(l opies of this patent may be obtained for five cents each,-by addressing the Commissioner of Patents,

Washington, I). G.

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